CVE-2025-47700: AI plugin APIs can be triggered using post actions

Severity: low (CVSS 3.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-21 · updated 2026-06-17
Weakness: CWE-918

Description

Mattermost Server versions 10.5.x <= 10.5.9 utilizing the Agents plugin fail to reject empty request bodies which allows users to trick users into clicking malicious links via post actions

Affected products

Mattermost: from 10.5.0 before 10.5.9 — fixed in 10.5.9

How to fix

Upgrade to a fixed version: Mattermost 10.5.9. Check the vendor advisory for mitigations.

References

https://mattermost.com/security-updates

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